ADC08D1500_09 Datasheet, PDF (1/40 Pages) National Semiconductor (TI) – High Performance, Low Power, Dual 8-Bit, 1.5 GSPS A/D Converter

ADC08D1500
April 20, 2009
High Performance, Low Power, Dual 8-Bit, 1.5 GSPS A/D
Converter
General Description
The ADC08D1500 is a dual, low power, high performance
CMOS analog-to-digital converter that digitizes signals to 8
bits resolution at sample rates up to 1.7 GSPS. Consuming a
typical 1.8 Watts at 1.5 GSPS from a single 1.9 Volt supply,
this device is guaranteed to have no missing codes over the
full operating temperature range. The unique folding and in-
terpolating architecture, the fully differential comparator de-
sign, the innovative design of the internal sample-and-hold
amplifier and the self-calibration scheme enable a very flat
response of all dynamic parameters beyond Nyquist, produc-
ing a high 7.25 ENOB with a 748 MHz input signal and a 1.5
GHz sample rate while providing a 10^-18 C.E.R. Output for-
matting is binary and the LVDS digital outputs are compatible
with IEEE 1596.3-1996, with the exception of an adjustable
common mode voltage between 0.8V and 1.2V.
Each converter has a 1:2 demultiplexer that feeds two LVDS
buses and reduces the output data rate on each bus to half
the sample rate. The two converters can be interleaved and
used as a single 3 GSPS ADC.
The converter typically consumes less than 3.5 mW in the
Power Down Mode and is available in a 128-lead, thermally
enhanced exposed pad LQFP and operates over the Indus-
trial (-40°C ≤ T_A ≤ +85°C) temperature range.
Features
■ ^{Internal Sample-and-Hold}
■ ^{Single +1.9V ±0.1V Operation}
■ ^{Choice of SDR or DDR output clocking}
■ ^{Interleave Mode for 2x Sample Rate}
■ ^{Multiple ADC Synchronization Capability}
■ ^{Guaranteed No Missing Codes}
■ ^{Serial Interface for Extended Control}
■ ^{Fine Adjustment of Input Full-Scale Range and Offset}
■ ^{Duty Cycle Corrected Sample Clock}
Key Specifications
■ ^Resolution
■ ^{Max Conversion Rate}
■ ^{Error Rate}
■ ^{ENOB @ 748 MHz Input}
■ ^DNL
■ ^{Power Consumption}
■ — ^Operating
— Power Down Mode
8 Bits
1.5 GSPS (min)
10^-18 (typ)
7.25 Bits (typ)
±0.15 LSB (typ)
1.8 W (typ)
3.5 mW (typ)
Applications
■ ^{Direct RF Down Conversion}
■ ^{Digital Oscilloscopes}
■ ^{Satellite Set-top boxes}
■ ^{Communications Systems}
■ ^{Test Instrumentation}
Block Diagram
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